Band-saw sharpener



June 11, I929. w, GROSSKOPF 1,717,206

BAND SAW SHARPENER Filed July 16,. 1928 2 Sheets-Sheet. 1

INVENTOR WITNESSES g v 'zzmm lp-ossko f ATTORNEY June 11, 1929. w oss op 1,717,206

BAND SAW SHARPENER Filed July 16, 1928 2 Sheets-Shet 2 WITNESSES ENTOR Wilam Gram/copf 1 gm 6 M/MW Patented June 11, 192 9.

WILLIAM'GROSSKOPE, on NEW, YORKQINYYU' AssIGNoE on onn ronnrr'r To. WILLIAM N. STEELE, OF NEW YORK,

N; Y., ONE-FOURTHTO GEORGE-MARTIN, or EASTELM- mms'r, NEW'YomgJANnoNE-EoURrH no WILLIAM 'ronnn, F FLUSHING, NEW

Application filed July 16,

This invention relates to saw sharpening devices and has particular reference to de-v vices for sharpening-band saws. 1

The invention prlmarily comprehends an improved device for sharpeningband saws which-is applicable to all standard makes of machines and which eliminates the necessity of removing the saw from the machine for the sharpening operation. V

*In view of the factthat, the teethof band saws vary in their; angular relation to the blade, it is essential to compensate for this variation, .and in this connection the present invention comprehends means for mounting the grinding and feeding elements -of the sharpening device whereby the same may be readily adjusted to coincide with vthe angularity of the saw teeth. I v.

Band saw teeth also vary as to their spacing and to compensatefor this the feeding element of the sharpeningdevice is: adjustable within certain limits so that one device may be employed for sharpeningsawso'fdifferent sizes or grades. 1 1

As a further. feature, the invention aims V to provide a simple and effective means for detachably associating the sharpening device with the table of a band saw machine. v

7 Other objects reside in. the simplicity of construction and mode of use of the device, the economy with which the same may be produced and thegeneral efiiciency derived therefrom. v v i I lVith the above recited. and other objects in View, reference is hadto the following specification and accompanying drawings in'which there is exhibited one example or embodiment of the invention while the appended claims define the actual scope of the same.

In the drawings Y Figurel is a side View of thesharpening device in applied relation-to the saw;

I Figure 2 is a plan view of the device; Figure 3 is a front end view thereof Figure 4 is a fragmentary side view on an enlarged scale. I V

I A designates aband saw blade B the table f BAND-SAW: sn Rp R 192s. Serial No.'. 293,256

which is provided-withitheusuirlslot (l, and Dithe saw guide. I 1 j v n The sharpening. device, constituting the present invention comprises a base 5 which is provided at its forward end with a dependmg foot 6 havin'g'a reduced depending centrally disposed lug Twhichisof a width to snugly engageiwithinv-the. saw slot C. The

. rear end of the base5 is provided with a simi lar depending h1g8 to fitwithinzthe saw slot O andiobvlously this disposes-the, base '5 at .a forwardly and upwardlydisposed inclinationwithrespectto the table B. J Itis obviousalso thatthe lugs 7 and 8 function'to prevent lateral movement of the base with respect tothe table B, while a suitable cl amp 9 is employed for. clamping the rear end of the 1 base down-onto the tableto prevent vertical or longitudinal movement of the :d evice'with respect thereto. U 1 I AA frame or platformlO is fulcrum'ed at 11 P T-M NT to laterally spacedlbearing ears 12 on the base 5 for rocking inovementon a'horizontal axis, which movement effected orcontrolled byany suitable means suclras aset screw13f" 1- p The frame or platform 10 carries at its forward end a substantially vertical shaft 14: which is disposed at a right angle to the platform and which projects upwardly therefrom and is suitably ournaled in a bearing 15 for rotation. The shaft has secured there to a pinion 16 which mesheswith a driving gear 17 securedltoua shaft 18 journaled ina bearing 19 on theframe or platform 10. The shaft 1.8 has attached to the upper end a crank handle 20 for. the purpose of rotating thedriving gear 17 and transmitting motion to thepinion 16 and shaft-14.

The shaft :14 hassecured thereto for rotation therewith a disk like member 21 upon which a segmental sharpening element 22' is arranged and upon which a segmental feeding element 23 is also arranged. The sharpening element 22 is clamped against/the member 21- by a Iclampinghead'24 which is impinged against the sharpening element 22 by a nut 25 threadedly engagingthe upper 2 end of the shaft 14.

The feeding element has inter-posed between its under side and the member 21 a wedge-shaped segmental shim 26, which dis poses one corner, designated by the reference character 27 in the same plane with the corner 28 of the sharpening element 22. The remaining corner 29 of the feeding element 23 is circumferentially spaced from and disposed in a plane below the remaining corner 30 of the sharpening element 22.

The wedge-shaped shim and the feeding element are fastened to the member 21 by bolts 31, and the shim 26 terminates short of or in spaced relation to the corner 29 of the feeding element. A bolt 32 extends through the free portion of the feeding element 23 and the member 21 and serves as a means for flexing the free portion to regulate the axial adjustment of the corner 29 of the feeding element 23 with respect to the corner 30 of the sharpening element 22 whereby to compensate for variation in the length of the teeth of saws of different sizes.

In use and operation, the device is applied to the table of a band saw machine by resting the rear end of the base '5 on the-upper surface of the table B, and the depending foot 6 on the upper surface of the table with the lugs 7 and 8 engaged in the saw slot G. The device is advanced toward the saw A,

and the set screw 13 is rotated in the proper direction to rock the frame or platform 10 so that the beveled edge of thesharpening element 22 coincides with the angularityof the teeth of the saw. The bolt 32 of the feeding element is adjusted to cause, the'corner 29 to be properly spaced from the corner 30 in accordance'with the length of the teeth of the saw to be sharpened. After these adjustments are made the clamp 9 is applied and the operator by turning the crank handle 20 imparts rotary motion to the shaft 14 in a clockwise direction thereby causing the member. 21 and the segmental sharpening and feeding elements 22 and 23 to be rotated in a counterclockwise direction, as shown by the arrow in Figure 2. It thus follows that the corner 29 of the feeding element engages under a tooth of the saw and cams the same upwardly, guiding the teeth onto the sharpening element 22 at its corner 28. As the up per surface and beveled edge of the sharpening element 22 engages the faces of the teeth the sa me will be sharpened. After the sharpening element 22 has completely operated on the faces of one tooth the corner 29 will engage with the next adjacent lower tooth and move the same upwardly as the sharpening element 22 is moved into engagement therewith. It will also be observed that the sharpening and feeding elements contact with the saw teeth at the point where the guide 1) takes up the saw blade From the foregoing it will thus be seen that a sharpening device for band saws has been devised by virtue of which the teeth will be expeditiously and effectually sharpened without removing the saw blade from the machine.

I claim:

1. In a band saw sharpening device, a base adapted for detachable associationwith the band saw table, a rockable adjustable frame mounted on said base, a rotary member carried by said frame, a segmental sharpening element, and a'helical segmental tooth-engaging a'nd'feeding element having one of its corners in the same plane with and abutting the corner of the sharpening element, and having its remaining corner axially spaced from the remaining corner of the sharpening element.

2. In a band saw sharpening device, a base adapted for detachable association with the band saw table, a rockable adjustable frame mounted on said base, a rotary member carried by said frame, a segmental sharpening element, a helical segmental tooth-engaging and feeding element having one of its corners in the same plane with and abutting the corner of the sharpening element and having its remaining corner axially spaced from the remaining corner of the'sharpening element, and meansv for effecting the relative adjustment of said spaced corners to compensate for variations in the sizes of the-teeth of dif ferent saw blades.

3. A sharpening device for band saws, comprising a rotary member, a segmental sharpening element detachably associated thereing elementsecuredto said member and dis posed in a plane at an angle to the sharpening element withone corner abutting the corner of the sharpening element and with the remaining corner axially spaced from the re maming corner of the sharpening element.

the remaining corner axially spaced from the remaining corner of the sharpening element,

and means for effecting the relative adjustmeat of said axially spaced corners to compensate for varlation 1n the size of the teeth 'of the saw blades to be operated upon.

5. A sharpening device for band saws, comprising a rotary member, a segmental sharpening element detachably associated therewith, a segmental tooth-engaging and feeding element secured to said member and dis- I posed in a plane at an angle to the sharpening element with one corner abutting the cor- .with, a segmental tooth-engaging and feedner of the sharpening element and with the remaining corner axially spaced from the re inaining corner of the sharpening element,

, means for effecting the relative adjustments of said axially spaeed eo rners to compensate for variation in the size of the teeth of the saw blades to be operated upon, and means for detachably and zidjustably associating the rotary member With the table of the band saw machine whereby the sharpening element 00- 10 i incides With the angularity 0f the teeth efthe saw blade.

day of July,

A. n. 1928. I

WILLIAM enoss county of 

